Design of a GMR Sensor Array System for Robotic Pipe Inspection

被引：9

作者：

Du, Winncy ^{[1
]}

Hai Nguyen ^{[1
]}

Dutt, Amitesh ^{[1
]}

Scallion, Kevin ^{[1
]}

机构：

[1] San Jose State Univ, Dept Mech & Aerosp Engn, San Jose, CA 95192 USA

来源：

2010 IEEE SENSORS | 2010年

关键词：

D O I：

10.1109/ICSENS.2010.5690126

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, the design and implementation of a GMR sensor array for utility pipe inspection is presented. Four GMR sensors with sensitivity of 0.9-1.3 mV/V are mounted uniformly around the circumference of a ring housing. Two bar magnets, located 180 degrees apart, are also mounted in the housing to magnetize the pipe for accurate defect detection. The instrumentation circuit, including 3 buffers, a difference amplifier, and a 4(th)-order low-pass filter, generates a clear smooth defect signal.

引用

页码：2551 / 2554

页数：4

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